$(document).ready(function (){
	
    var dateTimePickerOptions = {
	showSecond: false,
	dateFormat: 'dd.mm.yy',
	timeFormat: 'HH:mm',
	stepHour: 1,
	stepMinute: 15,
	locale: 'de_DE'
    };
    
    $('#birthday').datepicker(dateTimePickerOptions);

});